page_title: Monocacy River bridge and viaduct
hierarchical_section_title: Monocacy River bridge and viaduct
caption_attribution_description: English: Interstate Commerce Commission survey of the Frederick and Northern railroad, predecessor (Frederick and Pennsylvania Line Railroad Company (F&amp;PL)) bridge and viaduct taken in December 1915 as bridge 65.35. The bridges crosses the Monocacy River.
context_page_description: The Monocacy River Railroad Bridge and Viaduct is a 326-foot open deck steel girder bridge with two main spans crossing the river and two viaduct sections crossing the floodplain, south of Walkersville, Maryland. Originally constructed by the Frederick and Pennsylvania Line Railroad Company. Construction began in late 1871, and continued until July 1872 when the railroad opened that year. It was rebuilt by the Pennsylvania Railroad prior first in 1900-1905 as an open deck riveted iron plate under girder bridge. In 1915, the bridge was surveyed as part of the Interstate Commerce Commission's effort to establish freight rates for the Parent railroad. In 1927, the Pennsylvania Railroad rebuilt the bridge again using deeper and thicker steel girders, but leaving the masonry piers intact. In 1972, the two 85 foot river spans were washed out by Hurricane Agnes. In 1982, the State of Maryland purchased the bridge as part of the railroad line. In 1995, the State rebuilt the river spans and Pier 3 which is located in the middle of the river crossing was completely reconstructed using concrete to replace the original masonry foundations.
context_section_description: The Monocacy River Railroad Bridge and Viaduct is a 326-foot (99 m) open deck steel girder bridge with two main spans crossing the river and two viaduct sections crossing the floodplain, south of Walkersville, Maryland. Originally constructed by the Frederick and Pennsylvania Line Railroad Company (F&PL). Construction began in late 1871, and continued until July 1872 when the railroad opened that year. It was rebuilt by the Pennsylvania Railroad prior first in 1900-1905 as an open deck riveted iron plate under girder bridge. In 1915, the bridge was surveyed as part of the Interstate Commerce Commission's ("ICC") effort to establish freight rates for the Parent railroad. In 1927, the Pennsylvania Railroad rebuilt the bridge again using deeper and thicker steel girders, but leaving the masonry piers intact. In 1972, the two 85 foot river spans were washed out by Hurricane Agnes. In 1982, the State of Maryland purchased the bridge as part of the railroad line. In 1995, the State rebuilt the river spans and Pier 3 which is located in the middle of the river crossing was completely reconstructed using concrete to replace the original masonry foundations.  In 2015, the State performed minor maintenance on the structure and painted some spans. 
   
  As of 2016, the bridge is in active rail service, operated by the Walkersville Southern RR.
caption: 1915 ICC survey photo
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